It depends where you live. Different countries have different legislation
There should be about 1 1/2" under the door before flooring.
width of car door
The most often chosen width of a front door is 36".
Width (excluding door mirrors): 66.1 in. (1.68m) Width (including door mirrors): 76.4in. (1.94m).
The average width of a garage door is typically around 9 to 10 feet.
The standard width of a garage door is typically 8 to 9 feet wide.
The standard width of a patio door is typically between 60 to 72 inches.
The width of a door is the distance between the side jambs. The detail of door measurement is shown at the web link below.
39 inch is the standard width of any door of house. 36 is the standard width (3 feet).
The width of a standard sliding glass door is typically between 60 to 72 inches.
The rough opening width for a 28-inch door should typically be about 2 to 2.5 inches wider than the door itself to allow for proper framing and clearance. This means the opening should be approximately 30 to 30.5 inches wide. Additionally, ensure there is enough space for the door hardware and shims during installation. Always check local building codes for specific requirements.
The standard width of a sliding glass door is typically between 60 to 72 inches.